Dipper-dredge.



V. G. ANDERSON.

DIPPEVR DREDGE.

APPLICATION FILED AUGJS, l9l6.

; Patented Jime 11,1918..'

3 SHEETSSHE ET I.

V. G. ANDERSON.

DIPPER DREDGE.

APPLICATION HLED AUG.I9. I916.

Patented June 11, 1918.

3 SHEETS-SHEET 2.

v. e, ANDERSON.

DIPPER DREDG E. APPLICATION FILED AUG.I9, l9l6.

Pateljlted June 11', 1918.

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ifnirn eras r VINCENT G. ANDERSON, OF THIEF RIVER FALLS, MINNESOTA, ASSIGNOB TO FREDERICK C. AUSTIN, OF CHICAGO, ILLINOIS.

DIPIPER-DREDGE.

Specification of Letters Patent.

Patented June 11, 1918.

Application filed August 19, 1916. Serial No. 115,765.

To all whom it may concern:

Be it known that I, VINCENT G. ANDER- SON, a citizen of the United States of America, and resident of Thief River Falls, Pennington county, Minnesota, have invented a certain new and useful Improvement in Dipper-Dredges, of which the following is a specification.

My invention relates to dredges of that kind in which a dipper is suitably mounted at the end of the swinging boom, and in which means are provided for operating the dipper in the earth or mud to cause'it to take up a load, as well as for causing the release of the load after the dipper reaches the desired place of discharge.

Generally stated, the object of my invention is to provide an improved and highly efficient dredging machine of the foregoing general character.

Another object is to provide an improved construction and arrangement tending to solve many of the problems involved in the general operation of dredging by means of a dipper machine of this particular character.

It is also an object to provide certain details and features of construction and combinations tending to increase the general efficiency and serviceability of a dredging dipper of the special construction shown and hereinafter described.

To these and other useful ends, my invention consists in matters hereinafter set forth and claimed.

In the accompanying drawings:

Figure 1 is a side elevation of a dipper dredge involving the principles of my invention, showing the dipper in partially raised position in full llnes, and showing the boom and the dipper in lowered position in dotted lines.

Fig. 2 is an enlarged side elevation of the dipper apparatus per 86, showing the same in the condition necessary for dumping the load.

Fig. '3 is a plan of the structure shown in Fig. 1.

Fig. 4 is a detail section on line 4-4 in Fig. 2.

Fig. 5 is a detail section on line 5-5 in F i 2.

Fig. 6 is an enlarged detail section on line 66 in Fig. 3.

As thus illustrated, my invention comprises a body Awhich may be a scow or boat which will float on the water, and which may be moved from place to place during the dredging operation, or it may be constructed to travel on land. A supporting structure comprising an upright frame X, an inclined mast or boom 0, and a forwardly projecting boom B, is mounted on the said body in any suitable manner. The boom B has its lower end pivoted at b to the frame members X and 1, whereby said boom may swing u and down in the manner illustrated in ig. 1. At its outer end, the boom B is provided with a pivoted beam D, which latter is pivoted at d uponthe end of the boom, whereby this beam is adapted to tilt about a horizontal axis. At its upper end, the beam D is provided with one or more sheaves 2 for the cable 3 which is arranged over the sheave or sheaves 4: on the upper end of the mast or boom C, and which cable is then wound upon suitable drummechanism (not shown) on the body A, in a manner that will be readily understood. In this way, and by operating thecable 3, the boom B and its pivoted beam D may be raised and lowered at will. A dip er E is pivoted at 6 upon the lower end of t e beam D, and is provided with an arm 5 for engaging the locking device F which is pivoted at f on the said beam. This locking device is simply a pivot arm with a roller 6 for engaging the end of the arm 5, in the manner shown in Fig. 6,-thereby to lock the dipper in loading position. This device F is connected b a link 7 with a pivoted lever-arm 8, and t e latter is provided with an operating line or cable 9 which travels under the sheave 10 on the boom B, whereby this line or cable may be pulled to throw the arm F upward and thus release the roller 6 from the end of the arm 5, thereby to allow the dipper to tilt into the position shown in Fig. 2. For restoring the dipper to its normal position on the beam, and for steadying the digging operation while a pull is being exerted on the line or cable 3 to fill the bucket, a flexible connection 11 extends from the ivotal point 12 on the rear end of the ucket to the under side of the sheave 13, which latter is mounted on the boom B, and thence upward to the frame of the pulley 14, the latter being supported in the loop or bight of the cable 15 which is attached at 16 to the mast O and supported by the sheave 17 mounted on said mast adjacent thereto. This cable may also be operated by a suitable winding-drum-mechanism on the body A of the dredging machine. A short hitch G, consisting of a length of chain or cable, is connected between the pivot e of the dipper and the ring 9 on the chain .or flexible connection 11, and thus hitch is slack (see Eig. 2) when the dipper is in dumping position.

The operation is as follows: When the boom Band the dipper are shown in posi-' tion in full lines inFig. 1, the lineor cable 3 is operated to lowerthe boom B, and at the same time the cable 15 is operated to pull the-dipperbackward into the position shown in dotted lines in Fig. 1, it being observed that at this time the pull is on the hitch G, wherebythe short section 18 of the chain 11 is slack-at the beginning of said operation. When the dipper hasassumed the loading or 0 crating position (see dotted lines in Fig. 1?, then the two portions G and 18 are taut. A pull is then exertedon the line or cable 3, suflicient to cause the beam D to move the dipper downward and forward, but at the same time a suflicient back pull is exerted on the cable 15 to keep the dipper steady. After the dipper has moved forward and gathered up a load, the continued operation of the cable 3 will serve to-swing the boom 13 upward, and a pull on the line or cable 9 wi'llthen trip the locking device F and release the dipper (see Fig. 2) thus releasing the load at the desired place of discharge. A pull on the cable 15 will then cause the connection 11 to pull the dipper into loading position, and the arm 5 will pass under the roller 6 and be auto matically locked in position thereby. Thus the dipper is successively raised and lowered and released each time it is raised to'dump a load.

The beam D, it will be seen, is freely pivoted on the boom B, in the manner shown, so that it is free to assume a position in alinement with the cable 3, and with the direct upward pull exerted thereby, when the'buoket and beam-and boom are raised out of the ground. In other words, it is possible to pull the beam D upward endwise until its upwardend is adjacent the sheaved, sufficient tension being maintained on the cable '15, if necessary, to hold the beam steady.

The invention, however, is not limited to the exact construction shown and described.

What I claim as my invention is:

1. A dredging or excavating machine comprising-a body, a boom pivotally supported on said body to swing up and down at its outer end, a beam pivoted on the outer endof said boom to tilt about a horizontal axis and to swing up and down with the beam, a dipper pivoted on the lower end of said beam, in position to scoop up a load by forward and upward movement away from the body, instrumentalities for hoisting said boom and to control said dipper to receive and dump the load, said beam being free to tilt into alinement with the upward pull exerted on the upper end thereof to hoist the boom, and means operated by one of said instrumentalities to control the pivotal action of the dipper on the beam to restore the dipper to operative position on the beam after the dumping of the load.

2. A dredging or excavating machine comprising a body. a boom pivota-lly supported on said body to swing up and down at its outer end. a beam pivoted on the outer end of 'saidboom to tilt about a horizontal axis and to swing up and down with the beam, a dipperpivoted on the lower end of said loelarn. in position to scoop up a load by forward and upward movement away from the body, and instrumentalities forhoisting said boom and to control said dipper to receive and dump the load, said beam being free to tilt into alinement with the upward pull exerted on the upper end thereof to hoist the boom, said instrumentalities comprising operating cables suitably connected with the upper and lower ends of said beam, thereby to raise and lower saidboom and tilt the beam thereon during the operation of the dipper, and means operated by one of saidcables to control the dipper.

3. A dredging or excavating machine comprising a body, a boom pivotally supported on said body to swing up and down at its outer end, a beam pivoted on the outer end of said boom to tilt about a horizontal axis and toswingnp and down with the beam a dipper pivoted on the lower end of said beam, and instrumentalities to control said dipper to receive and dump the load, said instrumentalities comprising a pivoted locking device to hold the dipper in loading position on said beam, a connection to control said locking device, a lever pivoted on the beam to connect said device with said connection, and means on the boom to engage said connection.-

4. A dredging or excavating machine comprising a body, a boompivotally supported on said body to swing up and down at its outer end, a beam pivoted on the outer end of said boom totilt about a horizontal axis and to swing up and down with the beam, a dipper pivoted on the lower end of said beam, andinstrumentalitiesto control said dipper to receive and dump the load, said instrumentalities comprising an overhead support provided with sheaves, cables supported by said sheaves, means to connect one cable with the upper end of said beam, means to connect the second cable with the lower end of said beam. a hitch from the second cable to the dipper, a locking device of said boom to tilt about a horizontal axis and to swing up and down with the beam, a dipper ivoted on the lower end of said beam, and instrumentalities to control said dipper to receive and dump the load, said instrumentalities comprising a flexible connection extending to the lower end of said beam, a flexible connection extendin to the upper end of said beam, and a hltch etween the dipper and the connection extending to I the lower end of the beam.

6. A dredging or excavating machine comprising a body, a boom pivotally supported on said body to swing up and down at its outer end, a beam pivoted on the outer end of said boom to tilt about a horizontal axis and to swing up and down with the beam a dipper pivoted on the lower end of sai beam, and instrumentalities to control said dipper to receive and dump the load, said instrumentalities comprising a sheave on the upper end of said beam, a stationary support provided with a sheave, an operating cable engaging said sheaves, a flexible connection extending tothe lower end of said beam a sheave on the boom to engage said flexible connection, operating means attached to the end of said flexible connection, means including a sheave to support said operating means, a hitch extendingbe tween the dipper and said flexible connection, a locking device on the beam, means on said dipper to engage said locking device, and a connection to operate said looking device.

Signed by me at Chicago, Illinois, this 31st day of July, 1916.

' VINCENT G. ANDERSON. 

